Method and device for composite position error evaluation

• Main Authors: BAO QIANGWEI, LIU SHAOLI, GUO CHONGYING, LIU JIANHUA, DING XIAOYU
• Format: Patent
• Language: English
• Published: 01.07.2015
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides a method and device for composite position error evaluation, and relates to the field of mechanical engineering. The method and device solve the problem that in the prior art, the composite position error evaluation cannot be achieved accurately. The method for the composite position error evaluation comprises the steps of acquiring geometrical characteristic information and composite position error setting information of a to-be-evaluated product; acquiring function geometry and benchmark geometry theory constraint information of the to-be-evaluated product according to the geometrical characteristic information; building a composite position error theory mathematical model of the to-be-evaluated product according to the function geometry and benchmark geometry theory constraint information and the composite position error setting information; performing three-dimensional convex hull construction on pre-acquired discrete sampling points of the to-be-evaluated product by adopting the convex hull theory of computation geometry; evaluating the composite position error of the to-be-evaluated product according to a three-dimensional convex hull and the theory mathematical model. According to the scheme, the accurate evaluation of the composite position error is effectively achieved.